Protective metal anode structure and preparation method thereof

A metal anode, protective technology, used in structural parts, active material electrodes, negative electrodes, etc.

Active Publication Date: 2013-01-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, so far, an effective metal lithium anode protection technology has not been developed in this field, which can reduce the lithium|electrolyte interface resistance, make the interface stable, and can improve the metal lithium cycle efficiency and prolong the battery cycle life.

Method used

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  • Protective metal anode structure and preparation method thereof
  • Protective metal anode structure and preparation method thereof
  • Protective metal anode structure and preparation method thereof

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preparation example Construction

[0070] In the second aspect of the present invention, a kind of preparation method of the metal lithium electrode material of metal aluminum-pyrrole composite modification is provided (referring to figure 1 ) and the characterization of its electrochemical performance, including:

[0071] (1) Configure different concentrations (0.1-1M) of pyrrole and electrolyte (such as: 1M LiPF 6 / (EC+DMC)(w / w 1:1)) mixed solution;

[0072] (2) According to the stoichiometric proportioning, weigh aluminum trichloride of different quality, be made into aluminum trichloride (0.1-1M)-pyrrole (0.1-1M)-electrolyte (as: 1M LiPF 6 / (EC+DMC)(w / w1:1)) mixed solution;

[0073] (3) In an inert atmosphere or a vacuum environment, two pre-prepared pieces with a diameter of 14mm and a thickness of

[0074] The fresh lithium foil of 1-2mm is used as electrode, and the mixed solution among above-mentioned (2) is electrolytic solution, obtains from U.S. Celgard

[0075] The company's polypropylene film ...

Embodiment 1

[0084] Adopting a metal lithium foil electrode with a diameter of 14mm and a thickness of 1-2mm, the polypropylene film obtained from U.S. Celgard Company is used as a diaphragm, and the electrolyte (1M LiPF 6 / (EC+DMC)(w / w 1:1)) mixed solution was used as the electrolyte, and the scan rate was 10mV / s, and the electrochemical impedance was tested as a function of time. Then, in an inert atmosphere or vacuum, use a pre-mirror-polished Cu sheet electrode of the same size as the working electrode, and other conditions are the same as above. After the battery is assembled, it is left to stand for 24 hours to perform a constant current charge-discharge cycle test. The results are shown in Table 1 below (see figure 2 with 6 ).

Embodiment 2

[0086] A metal lithium foil electrode with a diameter of 14mm and a thickness of 1-2mm is used, and the polypropylene film obtained from U.S. Celgard Company is used as a diaphragm, and pyrrole (0.1M) / electrolyte (1M LiPF 6 / (EC+DMC)(w / w 1:1)) mixed solution was used as the electrolyte, and the scan rate was 10mV / s, and the electrochemical impedance was tested as a function of time. Then, in an inert atmosphere or vacuum, use a pre-mirror-polished Cu sheet electrode of the same size as the working electrode, and other conditions are the same as above. After the battery is assembled, it is left to stand for 24 hours to perform a constant current charge-discharge cycle test. The results are shown in Table 1 below.

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Abstract

The invention relates to a protective metal anode structure and a preparation method thereof. The protective metal anode structure comprises a metal anode and a composite protective film formed on the metal anode and contacted with the metal anode directly, wherein the metal anode comprises a metal selected from the following groups of an alkali metal and an alkaline earth metal; and the composite protective film comprises inorganic compound particles dispersed in an organic compound matrix. The invention also provides the method for preparing the protective metal anode structure.

Description

technical field [0001] The invention belongs to the field of chemical power sources, and relates to a protective metal anode structure and a preparation method thereof, in particular, to a preparation method of an inorganic-organic composite modified battery metal electrode, through composite modification, a composite protective layer can be formed on the surface of the metal electrode . The invention utilizes the reaction of metal lithium and pyrrole to form a lithiated pyrrole organic protective film on the surface of metal lithium, and at the same time, metal lithium reduces metal aluminum ions to form another inorganic lithium aluminum alloy protective layer, and the two compete to form a composite protective layer. . Background technique [0002] With the gradual reduction in weight of various multifunctional portable electronic products such as video cameras, mobile phones, and laptops, research on batteries used in these electronic products is also increasing. Where...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/134H01M4/1395
CPCH01M4/382H01M4/628H01M4/0452H01M4/134H01M4/405H01M2004/027H01M4/381H01M4/1395H01M4/366H01M4/0495H01M4/0402H01M4/62H01M4/40Y02E60/122Y02E60/10
Inventor 温兆银吴梅芬刘宇黄乐之迈克·巴汀何琳
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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